Rotary drill.



H. D. HAMPTON.

ROTARY DRILL.

APPLICATION FILED JULYIZ, I915.

1,1 Patented July 25,1916.

3 SHEETS-SHEET 1.

WITNESSES: I lV/VTOR hww, P W W 115M 12 -1- H. 0. HAMPTON.

ROTARY DRILL.

APPLICATION FILEQ JULYIZ, I915.

Patented July 1916.

3 SHEETS-SHEET 2.

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, WITNESSES:

H. D. HAMPTON.

ROTARY DRILL.

APPLICATION FILED JULYIZ, 19151 Patented Jul; 21), 1916.

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IN VEN TOR.

UNITED s P N i ion.

HARRY D. HAMPTON, 0F FRESNO, CALIFORNIA, ASSIGNOR OF ONE-SIXTH 'IO OSCARBOWMAN, OF FRESNO, CALIFORNIA.

ROTARY DRILL.

Specification of Letters Patent. Patented uly 25, 1916,

Application filed July 12, 1915. Serial No. 39,293.

To all whom it may concern.

Be it known that I, HARRY DONALD HAMPTON, a citizen of the UnitedStates, residing at Fresno, in the county of Fresno, State ofCalifornia, have invented certain new Improvements in Rotary Drills.

The following is a full, clear, and exact description of the same, suchas will enable others, skilled in the art to which it appertains, tomake and use the same, reference being had to the accompanyingdrawings,. for a better comprehension thereof, which form'a part of thisspecification.

My invention relates to a rotary drill.

My object is to so construct a bit of such novel leverage parts andconnections, so mounted on a suitable cylindrical shaft or stem withbits attached, that the entire mechanism can be lowered, preferably bycable, through a drill pipe or tube, to a specially constructed shell orretainer at the bottom of the pipe thereof; and, by action of its leversand parts, the blades of the bit will be expanded to a set width, and belocked securely. Or, when desired this bit and medhanismmay be removedfrom its special retainer or shell by attachment of cable, and drawn upand out of drill pipe, for the purpose of renewal or sharpening; thuscausing a great saving in time over existing methods, whereby it isnecessary in order to change bits, to remove the entire drill pipe fromthe well, or other holes being sunk, unscrewing the same into shortlengths at great loss' of time. This great economy, I accomplish by thepeculiar construction, novel combination, and adaptation of parts,hereinafter particularly described, and specifically pointed out in theclaims hereunto annexed, .reference being had to the accompanyingdrawings, in which the stem or shaft with its levers, connection andblades are shown in their various positions of action and workingrelations.

Figure 1 shows the stem, with blades of bit collapsed, and position ofcenter blade, when bit is in readiness to be lowered or raised throughthe drill pipe. Fig. 2 shows an outline of the drill shell or retainer,with all parts of bit in place, ready for drilling. Fig. 3 is the sameas Fig. 2, excepting that a portion of the shell .or retainer isremoved, showing a portion of the structure by which the blades of thebit are adjusted into place in the drill collar. Fig.

4 shows a portion of the shell or retainer attached to the lower partthereof, to which stem is attached and suspended, the mechanlcal devlcesused in the adjusting, ex-

panding, and collapsing of the outer blades of the bit. Fig. 6 showsanother view of the bit and stem. Fig. 7 shows an enlarged view of theupper part of Fig. 1, known as the packer, with fishing tool inserted,ready to be pulled to the surface. Fig. 8, another view of the outsideblades of the bit. Fig. 9, broken view of packer an'd fishing tool. Fig.10, inside half of shell or retainer, with guide slot. Fig. 11, anotherview of packer. Fig. 12, detached view of hanger connecting piece atlower end and connection bar above. Fig. 13 shows springed .lock. Fig.14 shows a. cross section view of the stem and shell or retainer, at thepoint indicated by blades are to be renewed or sharpened. In connectionwith this structure I provide a' member movably attached to the drillmechanism which member can be removed when the'drill mechanism is inproper position withinthe drill shell. When it is necessary to repairthe drill mechanism, this member is inserted into the drill tube and"can be attached to the drill mechanism in such a manner that suchmechanism can" then be collapsed and removed from the drill tube to thesurface of the ground for such repairs or inspection as is needed andthen be again lowered to the bottom of the drill tube and into the drillretainer or, shell at the lower end thereof. The collapsed bit islowered to the drill shell or retainer until latches (i engage theguides fi) which guide them to their prdper places, allowing latches (2'to expand, thus releasing latches ing the lifters (g I cess The dogs (g)expand and come (71 thus releasing the stem (0), and lower- The weightof the blades (a) is now shifted from the lifters (9 to the hangers (9),allowing the blades (a) to gravitate, and be pushed into position as theblade (6) is lowered to its proper place. Latches (i can only expandinto recess (7' when the blades are in working position. When latches (iare expanded, they release the packer (6), allowing it to be forceddown, thereby expanding the rubber ring (6 at the same time bringingdisengaging nut (0) in contact with the water pipe (1), forcing thefishing stem (1') up into the fishing tool, pulling in dogs (9),

thereby releasing fishing .tool, which is.

pulled to the surface leaving bit in place for drilling. Blades (a) areheld firmly in position and reinforced by shoulders thereof fitting intoslot (m) ,in drill retainer or shell.

When the bits (w) and (b) are to' be changed,'the engaging nut 0 isplaced instead of nut (0), on the fishing tool stem (1-), and loweredinto and through the drill pipe, until nut (0 comes in contact withspring (39), releasing, spring 2) from reinto contact with recesses (6),thereby connecting fishing tool to packer. The packer is raised untilslide blocks come into contact with top of slot (8 thereby allowingrubber ring (6 to contract, and at the same time releases latches (i Thestem (0) is now'raised. The stem (0) continues to be raised until lugs(w) come into contact with ledges w in lifter slot which raises lifter(9 (the lifters (9 are composed of two parts suitably hinged together,thereby raising and folding the blades (a) into collapsed position, withthe guidance of connecting pieces (72, which are thrown at right anglesfrom hangers (g). The latches ('5 are then allowed to pull into slot(8), which releases latches $11 from slots (8 at the same time bar 72.which connects the hangers, comes into contact with the bottom of slot(8 The structure is then entirely released and ready to pull to thesurface.

No'rn. 1.The slide blocks (n). are recessed into slots (S of packerpiece (e).

NOTE 2.-.(L shows water course and (10 shows spring which holds fishingtool stem raised, thereby holding dogs in collapsed position, whendesired.

Havingthus described my patent, what I' claim as new, and desire tosecure by Letters Patent, .is: I

1. The combination with a retaining shell, of a stem movable through theshell, hangers carried by the stem, bits flexibly connected with thehangers, means whereby the hang.

ers may be placed in stationary position with respect to the shell, saidstem being movable with respect to the hangers andadapted to movebetween the bits to extend same when the hangers are held stationary, asdescribed.

.2. The combination with a retaining shell, of a stem movable throughthe shell, hangers slidablymounted on the stem, expansible bitssuspended on the hangers, means for fixing the hangers stationary withinthe shell, said stem being movable between the bits to expand and holdthem expanded while the hangers are held stationary, as described.

3. The combination with a retaining shell, of a stem movable through theshell, hangers slidably disposed on the stem, bits flexibly engaged withthe hangers, lifters on the stem arranged to normally hold the bits infolded position, means on the hangers engageable with the stem to holdthe stem in predetermined position while the bits are suspended on thelifters, means on the'hangers engageable with the shell to hold thehangers in fixed position and to release the stem whereby it cangravitate to move between the bits to expand and hold same expandedwhile the hangers are held stationary, as described.

4. The combination with a retaining shell, of a stem movable through theshell, hangers slidably mounted on the stem and provided with engagingmeans for holding of. a stem movable through the shell, hangers slidablymounted on the. stem, bits, links connecting the hangers with the bits,lifters on the stem flexibly connected with the bits and arranged topull the bits into folded position, means on the hangers engageable withthe stem to hold the stem fixed stationary. with respectto the hangerswhenthe bits are in such folded position, means on the hangersengageable with the shell to hold the hangers stationary with respect tothe stem and to release the stemfrom engagement with the hangers, saidst'em being arranged to gravitate to release the bits from thesuspension on the lifters andto allow the stem to move between andexpand the bits, as described.

6 The combination with a retaining shell, of a stem movable-through theshell, hangers slidably disposed on the stem, bits, links connectingthehangers and the bits, lifters on the stem, links connecting thelifters with the bits, means on the hangers engageable With the stem tohold it in a lifted position, means on the hangers engageable with theshell to hold the hangers stationary with respect to the stem and torelease the stem from engagement with the hangers to allow the stem tohave movement with respect to the hangers, as described.

7. The combination with a retaining shell,

of a stem movable through the shell, eX-v pansible bits carried by thestem and arranged to expand when projected below the shell, a packermovable through the upper end of the stem, the upper end of the stemafter the expanding of the bits to allow the packer to be moved againstthe ring to force it into said groove, as described.

In testimony whereof, I have afiiXed my signature in the presence of thetwo witnesses.

HARRY D. HAMPTON. W'itnesses:

ERNEST KLETTE, D. E. SORENSEN.

